Sectional sprocket-wheel.



O. WOOLNOUGH & G. F. WHEELER.

SEC-TIONAL SPROOKET WHEEL.

APPLICATION FILED MAY 20, 1910.

Inventors Attorneys Patented Sept. 6, 1910.

0940155 Wadi/V0066 & 620662' F WA/ZZZKA W1tnes=es UNITED STATES PATENTOFFICE.

CHARLES WOOLNOUGH AND GEORGE F. WHEELER, OF MONTREAL, QUEBEC, CANADA.

SEGTIONAL SPROCKET-WHEEL.

T all whom it may concern:

Be it known that we, CHARLES WVooLNoUoH and GEORGE F. \VHEELER, bothsubjects of Great Britain, residing in the city of Montreal, Province ofQuebec, Canada, have invented certain new and useful Improvements .inSectional Sprocket-Vheels; and we do hereby declare that the followingis a full, clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains tomake and use the same.

The invention to be hereinafter described relates to a driving gear andmore particularly to sectional sprocket wheels.

Broadly speaking it comprises a tubular flanged hub which may be readilycast or forged or otherwise manufactured a plural ity of toothedsections adapted to be removably secured to the hub or to the flangeextending therefrom and means for connecting the toothed sections to thehub or the flange of the hub.

In order to more clearly disclose the construction operation and use ofthe invention reference should be had to the accompanying drawingsforming part of the present application.

lrawings like reference characters designate the same parts.

In the drawings :Figure l is a side elevation of the face of thesprocket; Fig. 2 is a central vertical section through the completedevice; and Fig. 3 is a view similar to Fig. 1 showing the opposite faceof the sprocket.

The main object of the invention is to provide a simple economical anddurable sprocket wheel which may be readily and cheaply manufactured andone in which the teeth may be readily renewed or replaced in case ofbreakage or wear.

Referring to the drawings in detail 1 indicates a hub of usual and wellknown construction which may be cast or otherwise cheaply and quicklyproduced. This hub is formed with a circular flange 2 provided with anannular seat shoulder or rim 3.

- Throughout the several figures of the Specification of Letters Patent.

Application filed May 20, 1910.

Patented Sept. 6, 1910.

Serial No. 562,433.

This rim shoulder or seat is formed with dove tailed mortises adapted toreceive co operating tenons 4. projecting from the face of segmental rimsections 5 provided with the usual sprocket teeth 6. These rim sections5 are formed with flanges 7 adapted to overlie the flange 2 extendingfrom the hub 1 and are provided with perforated ears 8 adapted for thepassage of clamping or holding bolts 9 which are passed throughperforations in the flange 2 and drawn down to holding position by meansof the tightening nuts 10. The mortise and tenon construction provides asimple solid and eflicient connection between the sections 5 and theflange 2.

It is thought that the operation and use of the invention will be clearfrom the preceding detailed description.

Changes may be made in the construction arrangement and disposition ofthe several parts of the invention without in any way departing from thefield and scope of the same and it is meant to include all such withinthis application wherein only a preferred form has been disclosed.

Having thus fully described our invention what we claim as new anddesire to se cure by Letters Patent is CHARLES VOOLNOUGH. GEORGE F.lVI-IEELER.

Witnesses:

V. S. BABoooK, E. J. GAUVIN.

